Improvement in blowing-machines



. 3 SheGts-Shet l.

J; D0UGHERTY BLOWING MACHINE.`

3 Sheets-Sheet 3.

` J.vnonGHRtr. BLUWING MAGHINB.

No. 105,318; Patented July 12, 1870.

Ela@

lititeil i tzrtet ma mit.

- JAMES DOUGIIERTY, OF PHILADELPHIA, PENNSYLVANIA.

` Letters Patent No. 105,318, dated July 12,1870.

IMPROVEMENT IN BLOWING-MACHINES.

The Schedule referred to in these Letters Patent and making part cf thecame.

T, .Lunas Doucnnn'rr, of Philadelphia., county o't Philadelphia, Stateof Pennsylvania, have invented a Blowing-Machine, of which the followingis a specification.

VNat-are and Object of thc Invention.

in the'cover-plates, all substantially as described hereafter.'

My invention further consists in the combination of the said innerrevolving cylinder and its radially reciprocating vanes with certainanti-friction disks,

caused by the vanes to revolve cccentrieallv as regards thesaid innercylinder.

'My invention also consists of further improvements, which, togetherwith the above, are -fully described hereafter, and which tend to thereduction of friction and the product-ion of a most effectiveblowingmachine.

Description of the Acconwanying Drawing.

` Figure 1 (drawing No. 1) represents a vertical section of my improvedblowing-machine;

Figure 2, an end view of the same;

Figure 3, (drawing No. 2,) a sectional plan of part of the machine;

Figures 4 and 5, vertical sections illustrating modifications of myinvention; and

Figures (i and 7, diagrams illustrating the action of the machine,illustrated by figs. 1, 2, and 3.

General Description. g

In figs. 1, 2, and 3, A represents a hollow cylinder, within whichrevolves a cylinder, B, of smaller diamc ter, the axis of one cylinderbeing arranged at a distance from but parallel to that of the other, andthe circumference of thc inner cylinder-revolving in close proximity totheintcrior of the larger cylinder at rt, tig. 1, without being inabsolute contact therewith.

'1`he outer cylinder has on one side ahollow projection, a, forming aninlet for the air, and on the opposite side a hollow. projection, b,through which thc compressed air is forced to the distributing-pipes.

The outer cylinder is closed at cach end by a cover-v platc, D, in whichthe shaft E, carrying the inner cylinder, has its hearings, as shown iniig.` 3, the shaft being furnished, ou the outside of the cover-plates,with suitable pulleys, F, for receiving driving-belts.

The inner cylinder B has radial recesses, four in the present instance,each receiving a vane, G, which, as

the cylinder revolves in the direction of the arrow, fig.

l1, reciprocate radially from and toward the shaft 1),

as explained hereafter, the outer edgesv being thereby caused totraverse in a circle, and in close proximity to, but without being in'absolute contact with, the interior of the outer cylinder.

On the inside of each cover-plate is formed a circu- -lar hub, b',concentric with the outer cylinder, and on the hub of each platerevolves a disk, H, iig. 3, which intervencs between thc ends of thcvanes G and the inside of the cover-plate. y

Each disk, as will be observed on reference to iig. .1, and to thediagram, figs. 6 and 7, has in the edge segmental recesses,corresponding in number to the vanes, and each recess forms, with thecylinder, a segmentcd'spaee, d, which is concentric with the cylinder'A. i

On cach end of each vane G, at thccorucrs of the same, is hung a roller,f, one roller fitting freely in one ofthe segment-al recesses Il, atoneend of the cylinder, and the other roller in one of the similarrecesses at the opposite end of the cylinder, so that, as the innercylinder revolves with 'ts vanes, the latter must slide in and outradially fr m the center of the shaft E, owing to the eccentricity ofthe latter as regards the disks and segmental rfpaces.

As the inner cylinder revolves, it carries with it the two disks H H,for thc rollers f of one of the vane's are always in contact with theends of one of each of thc segmental spaces d.

rlhis will be best understood by reference tothe diagrams in drawing No.3, which I will now proceed to explain.

In tig. (i, the shaft E,'carrying the inner cylinder, is supposed to berevolving in the direct-ion of the arrow.

rlhe roller f of the vane G is in contact with the end of the segmentalspace d, and therefore the said vane is in the act of carrying the diskround, while the rollers of the other vanes, being free from contactwith the ends of their respective segmental spaces, do not contribute tothc movement ot the disk.

When the Vane G has reached the position shown in iig. 7, however, thevane G has become the acting medium through which the inner cylinder iscaused to carry round the disk, for its roller is bearing on the end ofits recess, d?, while the end of the segmental space d, moved fasterthan the roller of the vane G by the action of the vane G', leaves theroller of the said vane G behind; in the mean time, the roller oi thevane G" is gradually approaching Vthe end of its segmental space, fig.7, vand. preparing to serve as a medium for moving the disk round whenthe rollerof the'vane G ceases to perform this duty.

It will be seen, therefore, that one vane after the other serves tocarry the disk round with the inner cylinder. i

Itwill be understood that t-hc object of the disks H, interposed betweenthe ends of the vanes and the permanent cover-plates, is to preventexcessive friction, which would take place if the vanes revolveddirectly in contact with the said pla-tes.

The extent of the diminution ot' the friction effected by the disks willbe understood when we consider the extent of surface over which the endof a vane will be in moving frictional contact with the disk during onerevolution; this surface is represented by the narrow space between thedotted lines 1/ y, fig. (i.

It should he understood that the entire surface of the disk does notrevolve in close frietonal contact with the inside ofthe cover-plate;the ange It of the disk revolves on the abovc-mentioned internal hub ofthe plate, as seen in fig. 3, and the disk bears against the annular ribi,'on the plate, and these are the only two points where the disk is incontact with the cover-plate.

The annular flange It, at the outer edge of the disk, against which theiiauge bears, revolves in close proximity to, but not in absolutecontact with, a shoulder, m, formed near the outer edge of the saidplate.

In order to prevent.- execssive friction of the vanes against the innercylinder, as the former' reciprocate radially in the latter, I'elnployrollers n, hung to projections on one side of and near the entrance toeach recess, the ribs at the back .of each vane bearing against theserollers, while the inner edge of each vane itself is provided withrollers 1 p, between ribs q and q', on opposite sides of the recess.

As the vanos revolve in the direction of the arrow, tig. 1, they are, ofnecessity, subjected to a great strain `in a contrary direction, butthis strain is transmitted to the inner cylinder through the rollers -np, the former revolving,r in contact with the ribs at the back of eachv'ane, and the latter in contactwith ribs q,

on the inner cylinder, so that the vaues reciprocate radially and withcomparatively little friction, therein, and forcethe air which entersthe outer cylinder through the inlet-opening a. from the outlet l), in acompressed state.

In the modification shown in fig. 4, the anti-friction to the oppositeouter corners of each vane, project into an annular recess, w, on eachcover-plate, so that the vanes must reciprocate as they revolve.

Claims.

1. A hollow stationary cylinder, having inlet and outlet openings andcover-plates, in combination with an inner and smaller revolvingcylinder, "situated cccentrically as regards the outer cylinder, andcarrying vanes caused to reciprocate radially by the action of plates ordisks turning within the outer cylinder or casing eccentrically to theinner cylinder, substantially as described.

2. y The combination of the said inner cylinder and its vanes withanti-friction disks H H, recessed to receive rollers or projections onthe said vanes.

3. The vanes G, reciprocating in recesses in the inner cylinder B, andbearing against the latter through the medium of rollers 12,1), asspecified.

In testimony whereof I have signed my name to this specification in thepresence ol' two subscribingr witnesses.

' JAMES DOUGHERTY. Witnesses:

H. Howsoiv, JOHN WHITE,l

